.clearfix::after{
    content: "";
    display:block;
    clear:both;
}



body{
    background: url("../images/reader_login.jpg") no-repeat ;
    background-attachment: fixed;
    background-size: cover;
    background-color: #000;
    margin: 0;
    min-height: 100%;
}

.main{
    width:100%;
}

.header{
    position: fixed;
    min-width: 600px;
    width: 100%;
    left: 0;
    top: 0;
    background: #000000;
    height: 27px;
    line-height: 27px;
}

.header i{
    float: left;
    color : #fff;
    font-size:23px;
    margin-left:10px;
    line-height: 27px;
}

.header a{
    color:#fff;
    text-decoration: none;
    line-height: 27px;
    margin-left: 2em;
}

.header .topmenu{
    margin: 0;
}

.header ul{
    display: inline;
}

.header .topmenu>li{
    list-style: none;
    float: right;
    margin: 0 20px;
    width: 120px;
    text-align: center;
}

.welcome{
    font-family: Pristina;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    font-size: 8em;
}

.footer{
    width: 100%;
    background-color: black;
    margin-top: 23%;
    position:fixed;
    bottom: 0;
    left:0;
    height: 100px;
}

.footer .mandarin{
    position: absolute;
    width: 250px;
    height: 90px;
    border-radius: 50%;
    overflow: hidden;
    left:50px;
    top: 5px;
}

.footer .mandarin img{
    position: absolute;
    width: 100%;
    height: 100px;
    left: 50%;
    top:50%;
    transform: translate(-50%,-50%);
}

.footer p{
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%,-50%);
    color: #7f7f7f;
}